Jeffrey Hildebrand, 53, is worth an estimated $5.5 billion. Hildebrand made his money with his energy company Hilcorp Energy. Hildebrand has had a big year in 2012 after Hilcorp sold several Gulf of Mexico assets for $550 million. less

Jeffrey Hildebrand, 53, is worth an estimated $5.5 billion. Hildebrand made his money with his energy company Hilcorp Energy. Hildebrand has had a big year in 2012 after Hilcorp sold several Gulf of Mexico ... more

Scott Duncan, 29, is worth $4.7 billion, and he is the son of the late Dan Duncan, who was formerly the richest man in Houston. Duncan died in 2010.

Scott Duncan, 29, is worth $4.7 billion, and he is the son of the late Dan Duncan, who was formerly the richest man in Houston. Duncan died in 2010.

Scott Duncan, 29, is worth $4.7 billion, and he is the son of the... Photo-3471366.49227 - StamfordAdvocate

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Milane Frantz, 42, is worth $4.7 billion, and she is the daughter of the late Dan Duncan, who was formerly the richest man in Houston. Duncan died in 2010.

Milane Frantz, 42, is worth $4.7 billion, and she is the daughter of the late Dan Duncan, who was formerly the richest man in Houston. Duncan died in 2010.

Milane Frantz, 42, is worth $4.7 billion, and she is the daughter... Photo-3471368.49227 - StamfordAdvocate

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Randa Williams, 50, is worth $4.7 billion. She is the daughter of the late Dan Duncan, who was formerly the richest man in Houston. Williams is worth $3.4 billion, and she is currently the director at Enterprise Products. less

Randa Williams, 50, is worth $4.7 billion. She is the daughter of the late Dan Duncan, who was formerly the richest man in Houston. Williams is worth $3.4 billion, and she is currently the director at ... more

John Arnold, 38, is worth an estimated $3 billion. Arnold made his money as the head of the hedge fund Centaurus Advisors. However, his early trading days started at Enron, where he traded oil for the energy company. Once the company collapsed, he went into business for himself. less

John Arnold, 38, is worth an estimated $3 billion. Arnold made his money as the head of the hedge fund Centaurus Advisors. However, his early trading days started at Enron, where he traded oil for the energy ... more

George P. Mitchell, 92, has been called the father of natural gas shale drilling. He was the first utilize horizontal drilling and hydraulic fracking to break open rock formations in Texas. He is worth an estimated $2 billion. less

George P. Mitchell, 92, has been called the father of natural gas shale drilling. He was the first utilize horizontal drilling and hydraulic fracking to break open rock formations in Texas. He is worth an ... more

Photo: Nick De La Torre, Houston Chronicle

George P. Mitchell, 92, has been called the father of natural gas... Photo-3471370.49227 - StamfordAdvocate

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Robert McNair, 75, is worth $1.8 billion, and he is known by most Houston residents as the owner of the Houston Texans. McNair made his fortune selling power operator Cogen Technologies to Enron in 1999.

Robert McNair, 75, is worth $1.8 billion, and he is known by most Houston residents as the owner of the Houston Texans. McNair made his fortune selling power operator Cogen Technologies to Enron in 1999.

Photo: Mayra Beltran, Houston Chronicle

Robert McNair, 75, is worth $1.8 billion, and he is known by most... Photo-3471375.49227 - StamfordAdvocate

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Thomas Friedkin, 76, is worth $1.7 billion, according to Forbes. He made his money by having exclusive rights to import Toyota vehicles in Texas, Oklahoma, Louisiana Arkansas and Mississippi.

Thomas Friedkin, 76, is worth $1.7 billion, according to Forbes. He made his money by having exclusive rights to import Toyota vehicles in Texas, Oklahoma, Louisiana Arkansas and Mississippi.

Tilman Fertitta, CEO of Landry's Inc. is worth an estimated $1.6 billion. He earned his money from his dining, hospitality and gaming company. He owns Bubba Gump Shrimp Company, Saltgrass Steakhouse and Landry's Seafood House. less

Tilman Fertitta, CEO of Landry's Inc. is worth an estimated $1.6 billion. He earned his money from his dining, hospitality and gaming company. He owns Bubba Gump Shrimp Company, Saltgrass Steakhouse and ... more